Soldering-iron furnace



I Nov. 3I 1925.

sonbnm non FuRNAcE -l Fild April 27. 1925 3 Sheets-Sheet 1 l In/mulo jmm , E W www;

Nov. 3 1925.

E. L. BULLOCK ET AL soLDERING IRON FURNAGE Filed April 27. 1925 cni- Nav. 3 [1925. 1,559,611

E. L. BULLOCK ET Al..

SOLDERING IRON FURNACE Filed April 27. 1925 3 Sheets-Sheet' 5 .9 I amm Patented Nov. 3, 1925.

UNITED Vsv'mf'ras rssaan PATENT ori-"1es,.lv

ERNESTL. BULLeoK Ann ELMER s. UMSTEAD; or PROVIDENCE; RHoDEisL/AND.

SOLDERING-IRON FURNAGE.

Application filed April 27, 1925 Serial No. A26,076.-

10 all 'whom it may concern j i Be it known that we, ERNEST L; B'ULLooK and Emma S. UMsTuAD, both citizens ofthe United States, residing at Providence, in the county of lrovidence and State of Rhode Island, have invented new and useful Improvements in a Soldering-Iron Furnace, of which the following is a specifica-v surfaceoutlet passages for conducting the products of combustion to the liuc 4which latter extends beneath the furnacefand upA at the back thereof. l' Y l A further and. equally important ob- 'ject is to incorporate or; -enclose the gas and air pipes in the walls ofthe furnace for preheating both the gas yand air before commingling.

Further, the invention resides in the provision of insulation and dead-air spaces about the furnace and the fine, and also in an improved burner structure. l

Other objects and salient features of construction will be described and set forth as thedescription progresses, reference being made to the accompanying'l drawings where- Figure 1 is a front elevationofthe improved furnace.

Figure 2 is a side elevation thereof;

Figure 3 is a vertical sectional view thereof on line 3-3 of Figure 1, with the coiled piping omitted:

Figure 4 is a bottom plan view of the burner nozzle and Figure 5 is a bottom plan view of the loose fire brick.

Referring more in detail to the accom-f panying drawings, the body 1 of the soldering iron furnace is preferably of cast iron lined on its interior with fire brick 2 and covered exteriorly with a heavy or .thick layer 3 of .asbestos or like heat=insulation.

' The insulating covering 3' includesa deadair space 4 extending about thecombustion chamber at its top, sides and back. j lThe fire brick lining, 2 defines 'a' combuse tion chamber 5 whichhas a recessedbottom, in the yrecess 6 ofwhich'is loosely mounted a fire brick 47. The bottom face A8 of thisr brick is fluted,y grooved,'or otherwise prio-l vided with channels 9v through `wlrich the products of combustion escape to the flue.

Directly above the loose lfire brick V7 is a pass and make their downwardly directed Venturi burnerflt) dis-3 posed in the roofof the combust'ionand ysoldering iron chamber *5 "so as 'tot send lits v flame jet down toward said' firtebrick.v The fuel forA the burnery nozzlez'is conveyed through two pipes, onean air' pipe' 11 and the other a gas pipe 12,vboth` embedded in liat coil form in the opposite side walls of the furnace, as depictedin Figure 1. The particular fluid is deliveredV to vthe lower end ofthe respective coil from'a valve-controlled supply pipe 13j, the upperends of the coils, extending inwardlyover the combustionzchamber and-thence upwardly toa preliminary '.mixing. chamber '14 spaced above the furnacei The4 combined fluid fuel thence passes to the valve chamber 15ffrom which it discharges' through the? jet orifice 16, across the air chamber 17, and into the orifice 18. A valve 19 is designedY to colact with theorifice 16` for causingthe fluidfuel to escape in jet formv across the inte'rver'i:w ing chamber or space 17 at which point an additional supply of air, at atmospheric pressure, isV commingled ywith the fuel to effect proper combustion. .The additional supply of air is admitted through the' lateral 'port 20 of a nipple 21, the size' ofthe port 2O being controlled by a ring like-fva-lve' or nut* 22 threaded" on the nipple 'for'l movement across said port. Tliisconstruction and ar'r'amgementV involves the f principle of the Bunsen burner or Venturi tube. The gaseous fuel thence passes downwardly to the nozzle 10 in which is inserted an orificev or grooved plug for discharging the gasv to produce an eiiicient flame. The products of combustion thence pass downwardly and through the passageways beneath the loose fire brick toward the 'front of the chamber and into the front leg 2S of the flue.

It will be noted that this leg is forward of the frontdoor 24 `of the furnace and is protected the insulating covering `of the same which forms a forwardly extending platform 25 between the front door 24 and a rest 26 for the soldering irons. The flue leg 23V opens downwardly into one end of a horizontal, connecting flue 27 which extends beneath the furnace and connects at its opposite end to the main flue 28, the insulating covering inclosing both the horizontal ue 27 and the -lower portion of 'the main flue.

ln use, the soldering irons are placed in the chamber 5 on the fire brick or floor, in which position the flame from the burner impinges thereon, and the waste products of combustion pass beneath the fire brick into the flue. The coils l1 and 12, being embedded in the furnace walls become highly heated to further the formation of the combustible fuel. The fire brick being loose permits easy remo-val thereof for cleaning and renewal. c Having thus described our invention, what we claim as new and desire tol secure by Letters Patent is:-

l. A soldering iron furnace comprising a chamberlined with lire brick and having a recessed bottom, and a loose firey brick in the bottom recess defining therewith an outlet passa-ge to a flue.

,y 2. A soldering iron furnace comprisingI a chamber having a recessed bottom, a fire brick loosely disposed in the bottom recess and formed in its underside with grooves defining outlet passages, a Hue to which the passages connect, and a burner directed ,downwardly toward the iire brick.

3. A soldering iron lfurnace comprising a chamber having a .recessed bottom, a fire brick loosely disposed inthe bottom recess and formed in Vits underside with grooves defining outlet passages, a. fine to which the passages connect, said fire brick adapted to support soldering irons, and a burner directed downwardly toward the fire brick.

1l. A soldering iron furnace comprising a chamber line with fire brick and formed in its bottom with a recess, a removable fire brick` loosely arranged in the recess and defining with the wall thereofAV an outlet passage, a flue connected to the outlet passage, a burner arranged in the top of theJ chamber,

`and a heat-insulating covering for the chamber provided with a dead-air space over the top and about the sides thereof.

5. A soldering iron furnace comprising a chamber opened at one end, a tool support outwardly of the chamber opening, a flue opening beneath said opening of the chamber, a burner in the chamber, and a fire brick loosely disposed within the chamber having a passage leading to the flue opening.

tion between the mixing chamber andthe burner.

8. A soldering iron furnace comprising a chamber, a burner in itsy upper portion, upwardly extending fuel and air pipes embed-ded in the opposite side walls of the chamber, a superposed mixing chamber connected to the upper ends of the pipes and to the burner, an auxiliary mixing chamber interposed between the first ymixing chamber and the burner, and an auxiliary air supply for the second mixing chamber.

9. A soldering iron furnace comprising a chamber, a burner in its upper portion, upwardly extending fuel and air pipes em.-

bedded in the opposite side walls of the chamber, a superposed mixing chamber connected to the upper ends of the pipes and to the burner, an auxiliary mixing chamber interposed between the first mixing chamauxiliary chamber having a lateral port opening to the atmosphere, and a ring-like valve threaded on the conduit for movement 'ber'and the burner, an air conduit for the 

